% 22 Feb 2021 23:19:01
\documentclass{article}
\begin{document}

{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{3}{c}}
\hline\hline
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}\\
            &\multicolumn{1}{c}{Pandemics}&\multicolumn{1}{c}{Wars}&\multicolumn{1}{c}{p-value}\\
\hline
$ h = 0 $   &        0.04         &       -0.01         &        0.41         \\
            &      (0.05)         &      (0.03)         &                     \\
[1em]
$ h = 10 $  &        3.12\sym{*}  &       -0.76         &        0.08         \\
            &      (1.81)         &      (1.21)         &                     \\
[1em]
$ h = 20 $  &        7.15\sym{**} &       -0.12         &        0.04         \\
            &      (2.90)         &      (1.93)         &                     \\
[1em]
$ h = 30 $  &        7.66\sym{*}  &        3.40         &        0.39         \\
            &      (4.07)         &      (2.72)         &                     \\
[1em]
$ h = 40 $  &        8.25         &        5.79\sym{*}  &        0.69         \\
            &      (5.11)         &      (3.40)         &                     \\
\hline
Observations&         522         &                     &                     \\
\hline\hline
\multicolumn{4}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{4}{l}{\footnotesize \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
}

\end{document}

